Crocodile dung used to be used as contraception.
That's right - reptile droppings. Amorous Ancient Egyptian women used crocodile pooh pessaries. Documents dating back to 1850BC refer to this method of contraception. Crocodile dung is actually slightly alkaline, like modern day spermicide, so it could have worked. On the other hand, it may well have been that after application neither party felt much like making love.
